Textile drafting device



Dec, 3, 1935. "r. P. ROONEY ,0 TEXTILE DRAFTING DEVICE 7 Filed Oct. 24, 1955 Ii'9.1. .2/ a? B/ H I "raven/E02.- Thomas BRoo way,

Patented Dec. 3, 1935 UNITED STATES PATENT OFFICE 2,023,032 TEXTILE DRAFTING DEVICE Thomas Peter Rooney, Fall River, Mass. Application October 251, 1933, Serial No. 694,967

5 Claims. (01. 19-142) My invention relates to textile drafting apparatus and aims to provide an improved drafting roll including novel bearing means, and which is inexpensive in manufacture and maintenance. In certain respects the present invention is an improvement upon that disclosed in my copending application S. N. 575,039, now Patent No. 1,933,222, dated October 31, 1933, as to which the present application is in part a continuation, as to all common subject matter.

In the drawing, illustrating by way of example certain embodiments of the invention,

Fig. 1 is a plan of a double roll in accordance With one form of the invention;

Fig. 2 is a section upon the line 2-2 of Fig. 1, showing also a portion of the underlying rolls;

Fig. 3 is a front elevation of another form of drafting roll embodying features of my present invention;

Fig. 4 is a vertical section through the rolls of Figs. 1 and 2, taken just inside one roll head or bearer, looking outwardly; and V Fig. 5 is a section of a modified form of bearing element.

The means of my present invention, as in my copending application, is useful in connection with drafting frames of the various types or classes including slubbers, intermediate, roving and spinning frames, and the portions of the frame here illustrated, for example, in Fig. 3, may be considered as representative of any of such drafting frames. In said Fig. 3 is shown a portion of one pedestal 2 upon which is a roll stand 3 carrying the roll bracket 4 for the lower rolls 5. Adjustable cap bars, which may be of any preferred or known form, are seen at 1, these supporting the longitudinal adjustable bearings 8 for the top rolls. The bottom rolls 5 may be of the fluted construction substantially as illustrated at 6 or may be otherwise formed.

Referring now to Figs. 1, 2 and 4, illustrating one example of the means of my present invention, I have there shown a drafting roll which is built up from a plurality of inexpensive and readily constructed parts which may be quickly assembled or replaced, at small cost, and with the avoidance of expensive machining operations such as generally necessary in connection with a roll having a solid core. This roll, see particularly Fig. 2, has a central longitudinal core or spindle element formed of a plurality of separable parts, including an elongated main portion I0 having at one or both ends the separable members or studs !2, this main portion or spindle proper and the end member or members 12 together constituting the axial or spindle element upon or about which the other parts are assembled. In the illustrated example the spindle proper lil is in the form of a tube having both ends formed for releasable connection with the studs, as by means of the threaded connection indicated at H. The outer ends of the studs I2 are formed with heads l3 constituted as hubs or main bearings for the roll as a Whole and may be slotted as indicated at H! or otherwise formed for engagement by a tool for turning them. In some instances the described spindle element may have the detachable portion such as the stud I2 at but one end, its other end being similarly shaped with a head or hub 13 integral with it.

The spindle element l0-l2 is adapted to receive and support, at the proper points along it, a plurality of disc bearers l5 and 15*, disposed in one or more pairs, depending upon the number of drafting portions to be provided in any given roll unit.

In this example of Figs. 1 and 2, the roll unit as a whole'is of the plural type, comprising two drafting portions, and the disc bearers at the adjacent inner ends of the two drafting portions are shown integrally formed as a single element, comprising the collar-like bearer portions I6, [6 spaced by the connecting portion or barrel I! of smaller diameter. The outer disc bearers l5, l5 are single while the intermediate bearer l5 comprises in effect two such single bearers disposed in oppositely facing relation and united by the barrel l1. These bearers are preferably molded, cast or pressed out of any suitable material'such as fiber or fiber composition, rubber, rubber composition, or other moldable composite or other material, but they may be of metal or otherwise formed.

The intermediate double bearer I5 is centrally recessed to receive the main portion ill of the spindle with a tight fit, and the latter is desirably provided with grooved, ribbed or other formations such as indicated at I8 for intimate interengagement with the walls of the recess in the bearer, to interlock the parts and resist relative turning movement between them. The outer or single bearers l5 are similarly centrally recessed for tight fitting reception of the shanks of the separable studs l2, or of the corresponding end portion of the spindle proper if integrally formed, these receiving portions also desirably being provided with grooves, ribs or like formations l9, similar to the formations l8,

for holding the bearers, against turning upon their supporting parts.

The pairs of bearers, herein including one outer bearer and the opposite bearer portion I6 of the double bearer l5, are adapted to center and support a sleeve 20 constituting the outer periphery of the built-up core or boss of the roll. These sleeves form the support for the multiplicity of pins, teeth, bristles, or points 2| similar to those of my copending application and which are secured upon the sleeve in any suitable manner but desirably in such way as to be readily replaceable, for example, substantially in the manner as illustrated. These points 2| may be studded in the manner of staples or U-shaped pins along fillets or bands 22 of leather, textile, or other suitable flexible material which are wrapped circumferentially about the sleeves 20, with their ends anchored as by means of rivets or other fasteners such as indicated at 2323, Fig. l. The several turns of the band or fillet are desirably in lateral contact, forming a continuous covering about each sleeve 20, the fillets extending substantially from end to end of the sleeve and the pitch of the spiral depending upon the width of the fillet. Thus substantially the entire outer surface of each sleeve 20 is studded with the radial points 2|, which, as in my copending application, may be steel wire members generally similar to those employed in card clothing, and preferably having their outer end portions angularly disposed relative to a radius of the roll, inclining away from the direction of rotation of the roll and of the travel of the sliver or roving. As in my copending application, the gauge and density of the points are proportioned to the kind of material to be operated upon, and to the drafting effect desired, the length of fiber, and other factors, examples of gauges and densities being noted in said copending application.

To assist in supporting and accurately positioning the point carrying sleeves 20, the bearers I 5, 15 in the example of Fig. 2, are provided at their inner faces with concentric conical elements 24. Over these are placed similarly shaped conical washers 25, for engagement with the ends of the sleeves 20, which are inwardly beveled or inclined as indicated at 26 toconform of the spindle element l0l2, and the corresponding washers 24 are applied. One sleeve 20 having its points 2| attached is slipped over each end of the spindle, and the outer washers 24 and outer bearers l5, through which the studs [2 have previously been inserted, are applied, the threaded portions of the studs being engaged with the threaded end portions of the spindle l6. As the stud or studs are turned home the several parts, including particularly the point carrying sleeves 20, are brought into accurate axial alignment and effectively centered and secured, by reason of the conical elements and washers already described.

The roll is thus complete and ready for use, its hub portions I3 being merely set into the roll bearings in the usual manner. The barrel portion I! of the intermediate bearer l5 affords opportunity for the application of a weight, in the customary manner, when desired. It will be noted, however, that the described construction adapts the roll for variable self-weighting in such instances where a self-weighted roll may be desired. For this purpose the main portion [0 of the spindle may itself be formed to afford the desired weight, interchangeable spindles of different weights being provided, or the spindle, where tubular or hollow, may be loaded with shot or the like to give such added weight as the circumstances call for. In some cases a separate collar or sleeve of lead or other weighting material may be applied inside the sleeve 20, either intermediate the latter and the spindle element or internally of the latter.

In operation the described multiple-point rolls, which are generally employed in the upper positions of the pairs of rolls of the various drafting mechanism, have peripheral engagement with the corresponding rolls of their pair, such as the fluted under rolls 5 here shown. The bearers l I5 are so proportioned with respect to the length of the points or pins 2| that they relieve the latter of the major portion or all of the bearing weight of the roll as a whole. The ends of the points contact or substantially contact the surface, or portions of the surface, of the corresponding roll, and the points are themselves adapted, when desired, to receive all or some portion of the roll weight, but with the use of the bearers the points are less readily deformed or misaligned and the life and efliciency of the roll as a whole are prolonged.

In connection with the bearers I5, l5 I have also here illustrated means, the use of which is optional, for finishing out the drafting surface of the roll into completely cylindrical form at the ends of the point-carrying portions, with avoidance of the surface gaps which otherwise occur at the ends of the fillets, due to their spiral disposition, and adjacent the fastening means for the fillets. For this purpose the bearers have at their inner faces an inwardly projecting flange or filler portion 21 extending approximately half way about the bearers and being of the tapering or wedge shape substantially as illustrated. That is, the flange is of less than complete circumferential extent and of progressively varying Width circumferentially of the bearer, its inner edge or face having an angle corresponding to the pitch of the point-carrying fillet. The widest portion of this arcuate, slanting flange is positioned adjacent the end of the fillet, and the peripheral surface of the flange serves to fill in the wedge-shaped gap at this location, complementing and conforming to the peripheral surface of the point endsthemselves. Accordingly substantially the entire width of the point-studded portion of the roll may be utilized for drafting engagement with the sliver or roving, and the drafting action is substantially uniform along the entire length of the roll.

The relieving effect of the bearers and their manner of cooperation with the opposite or underlying rolls will also be clearly understood by reference to the cross-sectional Figure 4. It will be understood that in the roll constructed as in Figs. 1 and 2 any of the parts may readily be replaced when desired. For example, the point-bearing sleeves 20 may be furnished separately and may easily be substituted in any roll.

In Fig. 5 I have illustrated a modified construction of bearer in which the bearer proper 15 is of uniform disc or plate form and the conical centering element 30 is formed as a separate circular plate-like device provided with nibs 3| for engaging and interlocking it with the adjacent inner face of the bearer l5". As shown in Fig. 5, the conical centering element 30 is of the same diameter as the bearer but in instances where the bearer is to be equipped with the arcuate filler flange this centering member may be of less diameter or may be cut away to accommodate such flange.

Referring now to Fig.3, I have there illustrated a plural drafting roll unit equipped with outer bearers l5 similarly as in connection with the assembled or built-up form of roll illustrated in and described in connection with Figs. 1, 2 and 4. In this instance, however, the roll is of the solid or machined core type such as illustrated in my copending application and the central recesses of the bearers are proportioned for reception directly on the core or spindle 32 of such roll, which extends as a solid or other core from end to end of the roll unit, its extremities forming the main bearings, as in said previous application. In such construction the inner or intermediate bearers are also generally formed as single elements, duplicates of the outer bearers, but if desired a double bearer unit similarly as in Fig. 2, but having a sufiiciently large barrel portion to receive the core or spindle 32, may be employed.

My invention is not limited to the particular embodiments thereof herein shown and described,

its scope being set forth in the appended claims.

I claim:

1. A drafting roll for yarn-drafting in slubbers, intermediate, roving and spinning frames, comprising, in combination, a spindle element comprising a bar and one or more end bearing members having threaded engagement with the bar, spaced bearer discs on the spindle element, conical centering means at the inner faces of the bearer discs and concentric with them, and a drafting member receivable about the spindle element between the bearer discs and having inclined formations for cooperation with said centering means.

2. In a drafting roll for yarn-drafting in slubbers, intermediate, roving and spinning frames, a bearer comprising a circular disc element having an axial positioning passage and concentric centering means at one face of the bearer for centering cooperation with another element of the roll, and an integral peripheral flange at said face of the bearer, of less than complete circumferential extent and of progressively increasing width for complementing the drafting portion of the roll. 5

3. A drafting roll for yarn-drafting in slubbers, intermediate, roving and spinning frames, comprising, in combination, a spindle element comprising a bar and one or more end bearing members having threaded engagement with the bar, spaced bearer discs on the spindle element, conical centering means at the inner faces of the bearer discs and. concentric with them, a sleeve receivable about the spindle element and having end formations for cooperation with said centering means, and a multiplicity of resilient wirepoints regularly disposed about the outer periphery of said sleeve approximately radially thereof and with their outer ends positioned substantially in the line of the circumference of said bearer discs cylindrically projected.

4. A drafting roll for yarn-drafting in slubbers, intermediate, roving and spinning frames, comprising, in combination, an axial spindle element having end portions providing end bearings for the roll, a pair of opposed bearer discs received on the spindle element, a sleeve fixedly and concentrically surrounding the spindle element between the bearer discs and having a peripheral yarn-drafting formation comprising a multiplicity of substantially radial resilient points, said bearer discs being fixedly positioned upon the spindle element and having endwise positioning engagement with said sleeve, and said bearer discs being of substantially coincident diameter with said peripheral drafting formation of the sleeve, for the purpose of pressure-relieving contact with a cooperating roll.

5. In a drafting roll for yarn-drafting in slubbers, intermediate, roving and spinning frames, a disc-like bearer adapted for operative positioning at an end of a drafting portion of the roll to support the same, and an integral peripheral flange at the inner face of the bearer, of less than complete circumferential extent and of pro- 4-5 gressively increasing width for complementing the drafting portion of the roll.

THOMAS PETER ROONEY. 

